\begin{table}[htbp]\centering
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\caption{Identification Table: Individual-Level.}
\begin{tabular}{l*{2}{c}}
\hline\hline
                &\multicolumn{2}{c}{Volunteer}        \\\cmidrule(lr){2-3}
                &       RF         &     2SLS         \\
\hline
AAA grants $\times$ farm owner&                  &    3.589\sym{***}\\
                &                  &  [0.555]         \\
Summer droughts: 1933-40 $\times$ farm owner&    1.256\sym{***}&                  \\
                &  [0.182]         &                  \\
Tenure in Agri committee: 1933-35 $\times$ farm owner&    0.122         &                  \\
                &  [0.486]         &                  \\
Farm owner      &   -0.001\sym{**} &   -0.020\sym{***}\\
                &  [0.000]         &  [0.003]         \\
Age FEs         &      Yes         &      Yes         \\
Birthplace FEs  &      Yes         &      Yes         \\
Individual controls (Census 1940) &      Yes         &      Yes         \\
\hline
\(R^{2}\)       &    0.016         &    0.007         \\
County FEs      &      Yes         &      Yes         \\
Mean dependent variable&    0.013         &    0.013         \\
Sample:         &     Farm         &     Farm         \\
Observations    &  2,443,042         &  2,443,042         \\
\hline\hline
\end{tabular}
\end{table}
